Welcome to HOTEL O2 -全室人工ラドン温泉-Adult only, a playful adults-only retreat in Nisshin, Japan. Located at Akaikecho Mochiro 153, the property sits about 2.6mi from the city center, offering easy access with a quiet vibe. Inside, enjoy free Wifi, free on-site parking, and a 24-hour front desk, while soundproof rooms, air conditioning, a bidet, a bathtub, free toiletries, and a view elevate comfort. Room service and a streaming service (like Netflix) are handy for cozy nights in, and upper floors are reachable by elevator.

This address has earned 878 reviews, a lively chorus of guest experiences that adds color to the stay.

An ideal pick for privacy-minded travelers, the setup blends convenience with a dash of indulgence—free parking, streaming nights, a bathtub, and views from upper floors.

Step into a playful adults-only retreat in Nisshin where quiet vibes meet stylish comforts. Soundproof rooms help arrangements stay peaceful, and amenities like air conditioning, a bidet, a bathtub, free toiletries, and a view add a touch of luxury. When downtime calls, a Netflix-style streaming option and room service turn evenings in into a cozy retreat, while upper-floor vistas are easy to reach thanks to elevator access.

Several room types bring options for different travelers: Deluxe and Standard Rooms are non-smoking and accommodate two adults and one child. The Standard Room is listed at 323 sqft, while Semidouble options are available in both non-smoking and smoking configurations.

Cash is not accepted, with JCB, American Express, Visa, Mastercard, NICOS, and UC among accepted payment methods. An ideal pick for privacy-minded travelers who want convenience with a touch of indulgence.